Several authors (Night Tempest, Alicia Nordwell, Rob Colton just to name a few) do what's called Wednesday Briefs where each week they're given a topic and have to write a chapter of a story revolving around that topic.
I have had the honor of being asked to join them, so I will be starting that soon. It will be all new characters and will not be connected to The Long Road series. I'm thinking about making it a scifi story, but I'm not sure if I can. We'll just have to wait and see what my Muse has to say about it.